Very Computer

Hi,

I'm trying to build rrdtool under Solaris 10 x86. When I run configure
I get a failure, and, looking in the log file I see:

configure:20342: gcc -o conftest -g -O2  -Llb/lib conftest.c  >&5
conftest.c:66: warning: conflicting types for built-in function 'acos'
Undefined                       first referenced
 symbol                             in file
acos                                /var/tmp//ccAbKrlg.o
ld: fatal: Symbol referencing errors. No output written to conftest

Does anyone have any ideas as to what I can try to prevent this
problem?

Thanks,
Mark

That looks like the arc cosine function (acos) is not being found. You
need to link with the flag -lm to link in the maths library.

cc numerical-prog.c -lm -o numerical-prog

You also want to have

#include <math.h>

but I think it will usually give an error during comile if that is not
present.
--
Dave K

http://www.southminster-branch-line.org.uk/

Please note my email address changes periodically to avoid spam.

for a couple of months only. Later set it manually. The month is
always written in 3 letters (e.g. Jan, not January etc)

Hi Dave,

Actually, I think that the fact that it _is_ being found is causing the
problem. The key phrase that caught my eye is "warning: conflicting
types for built-in function 'acos'" which must mean that the compiler
found more than one choice for this declaration.

But, perhaps I'm off base.

Mark